jitter DV grab in wrong format

I am trying to use the jit.qt.grab object and I seem to be getting a SECAM video stream (I am based in the UK and therefore am a PAL kind of guy). When I get into the video settings to attempt to rectify the format, it automatically reverts to SECAM. The resultant display on the preview/monitor is fragmented screen areas and about half as many lines of pixels, although you can just about make out that the camera is indeed picking up the environment.

Is this a codec thing? I am on windows and I downloaded the relevant digitizing software as per the help file (VDig and Abstract Plane). Can anyone help?